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Finding the Fourth Proportional to 372.12, 512.76 and 351.72

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Solution

The fourth proportional to 372.12, 512.76 and 351.72 is: 484.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.12 : 512.76 = 351.72 : x
  2. Step 2: Convert to fraction form
    372.12/512.76 = 351.72/x
  3. Step 3: Cross multiply
    372.12x = 512.76 × 351.72
  4. Step 4: Simplify right side
    372.12x = 180,347.95
  5. Step 5: Solve for x
    x = 180,347.95/372.12
  6. Step 6: Final answer
    x = 484.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.